JPS6042012A - Method and device for manufacturing hollow precast concrete product - Google Patents

Method and device for manufacturing hollow precast concrete product

Info

Publication number
JPS6042012A
JPS6042012A JP15023483A JP15023483A JPS6042012A JP S6042012 A JPS6042012 A JP S6042012A JP 15023483 A JP15023483 A JP 15023483A JP 15023483 A JP15023483 A JP 15023483A JP S6042012 A JPS6042012 A JP S6042012A
Authority
JP
Japan
Prior art keywords
formwork
shaft
concrete
precast concrete
product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15023483A
Other languages
Japanese (ja)
Inventor
伊藤 吉孝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daido Concrete Co Ltd
Original Assignee
Daido Concrete Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daido Concrete Co Ltd filed Critical Daido Concrete Co Ltd
Priority to JP15023483A priority Critical patent/JPS6042012A/en
Publication of JPS6042012A publication Critical patent/JPS6042012A/en
Pending legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、基礎杭等の中空プレキャストコンクIJ −
ト製品を製造する方法及びその装置に関するものである
[Detailed description of the invention] The present invention provides hollow precast concrete IJ-
The present invention relates to a method for manufacturing a product and an apparatus therefor.

杭のような中空プレキャストコンクリート製品の製造は
、従来遠心力成型によって行なわれているが、この方法
ではコンクリートが遠心力により分離し、製品の強度低
下をまねく欠点がある。そこで、旧来の手詰めによる成
型法の採用も考えられるが、この方法では中空部を形成
させるためのシャフトを直状に保持することが困難なげ
かりでなく、脱型時のシャフトの引抜きが、脱型用とし
て従来用いられているパラフィン等の剥離剤の塗布のみ
では困難で、しかもこの剥離剤は高価であるため製品が
コスト高になる等のことから実施されていないという状
況である。
Hollow precast concrete products such as piles have conventionally been manufactured by centrifugal force forming, but this method has the disadvantage that the concrete separates due to centrifugal force, resulting in a decrease in the strength of the product. Therefore, it is possible to adopt the traditional molding method by hand filling, but this method not only makes it difficult to hold the shaft straight to form the hollow part, but also makes it difficult to pull out the shaft during demolding. It is difficult to apply only a release agent such as paraffin, which is conventionally used for molds, and this release agent is expensive, so this is not practiced because it increases the cost of the product.

本発明は、中空プレキャストコンクリート製品の製造に
おける上記従来の欠点を解消するためになされたもので
、手詰め製法を採用し、中空部形成のためのシャフトの
保持及び脱型時におけるシャフトの引抜きが容易に行え
るようにすることにより、良質、高強度の製品を経済的
に製造しようとするものである。
The present invention was made to eliminate the above-mentioned conventional drawbacks in manufacturing hollow precast concrete products, and employs a manual filling method, making it easy to hold the shaft for forming a hollow part and to pull out the shaft during demolding. The aim is to economically produce high-quality, high-strength products by making it possible to produce high-quality, high-strength products.

以下1本発明の実施例について説明する。An embodiment of the present invention will be described below.

図面は本発明において使用する製造装置の一実施例を示
したもので、1は柱状のコンクリート製品成型用の型枠
体で、断面半円弧状に形成された下型枠2と、この下型
枠2に接続する一対の縦割状とした上型枠6.3とを有
している。そして、下型枠2は、その軸線方向に浴う長
手補強板4及びその横断方向に沿う複数の横手補強板5
.5・・・を介して架台6上に支持されている。上型枠
3.3にはそれぞれ下型枠2の横手補強板5と対応した
位置に補強支持板Z7・・・が設けられ、上型枠3.3
はこの補強支持板7と横手補強板5とのビン結合8によ
って下型枠2に対してそれぞれ第3図矢印の方向に開閉
自在に取付けられている。また、一対の上型枠3.乙の
上部適所にはそれぞれブラケット9゜9が対向して設け
られ、上型枠6.!Iが閉じられた状態で、これらブラ
ケット?、9を連結体10によって結合し、上型枠6.
3が閉じた状態を維持できるようにしている。
The drawing shows an embodiment of the manufacturing apparatus used in the present invention, in which 1 is a form body for molding a columnar concrete product, a lower form 2 having a semicircular arc cross section, and It has a pair of vertically divided upper forms 6.3 connected to the frame 2. The lower formwork 2 includes a longitudinal reinforcing plate 4 extending in its axial direction and a plurality of transverse reinforcing plates 5 extending in its transverse direction.
.. 5... are supported on a pedestal 6. The upper formwork 3.3 is provided with reinforcing support plates Z7 at positions corresponding to the horizontal reinforcing plates 5 of the lower formwork 2, respectively, and the upper formwork 3.3
The reinforcing support plate 7 and the horizontal reinforcing plate 5 are each attached to the lower formwork 2 by means of a bottle joint 8 so as to be openable and closable in the direction of the arrow in FIG. In addition, a pair of upper formwork 3. Brackets 9°9 are provided at appropriate positions on the upper part of B to face each other, and the upper formwork 6. ! These brackets with I closed? , 9 are connected by a connecting body 10, and the upper formwork 6.
3 to maintain the closed state.

11は、コンクリート製品に中空部を形成させるために
型枠体1の中心軸線に泊って配設されるシャフトで、図
示のものは断面角形となっているが。
Reference numeral 11 denotes a shaft that is disposed along the central axis of the form body 1 in order to form a hollow part in the concrete product, and the shaft shown has a rectangular cross section.

これは断面丸形のものであってもよい。そして、このシ
ャフト11ハ、前記の連結体1oにネジにより外陣調節
自在に垂設した吊杆12の下端に、ネジ16により着脱
自在に取付けられた支持環14によって支持されるよう
になっているとともにシャフト11の基端には型枠体1
より突出して引抜用の取手15が設けられている。
This may have a round cross section. This shaft 11c is supported by a support ring 14 which is removably attached with a screw 16 to the lower end of a hanging rod 12 which is vertically adjusted by a screw on the connecting body 1o. At the same time, a formwork body 1 is attached to the base end of the shaft 11.
A handle 15 for pulling out is provided to protrude further.

16は型枠体1により製造するコンクリート製品と一体
化させる既製部材で1例えば図示のような杭の尖頭部が
適用される。この既製部材16は中心部に貫通(い7を
有するコンクリート本体18の外周を保護鉄板19によ
って被覆しており、その外周にはらせん形のプレイド2
0が突設されているととも罠、コンクリート本体18の
所要位置にはコンクリート製品の軸鉄筋22の挿通孔2
1が設けられている。
Reference numeral 16 denotes a ready-made member to be integrated with the concrete product produced by the form body 1, and 1, for example, the pointed head of a pile as shown in the figure is applied. This ready-made member 16 has a concrete body 18 having a through hole 7 in the center, and the outer periphery of the concrete body 18 is covered with a protective iron plate 19, and a spiral plaid 2 is attached to the outer periphery of the concrete body 18.
0 is provided protruding from the trap, and the concrete body 18 has an insertion hole 2 for the shaft reinforcing bar 22 of the concrete product at the required position.
1 is provided.

そして、既製部材16はその基端部を型枠体1の端部内
に嵌入させてシャフト11と係合させ、中間部は架台6
に設けた補助台23に支持させるとともに。
The base end of the ready-made member 16 is fitted into the end of the form body 1 and engaged with the shaft 11, and the intermediate part is inserted into the frame 6.
While supporting it on the auxiliary stand 23 provided in the.

先端部も架台6にその長手方向に対して移動自在に設け
た軸鉄筋引張用台車24に支持されるようになっている
。また台車24には所定の位置に軸鉄筋22を通す係合
孔25,25・・・が設けられている。
The leading end portion is also supported by a shaft reinforcing bar tensioning cart 24 provided on the pedestal 6 so as to be movable in the longitudinal direction thereof. Further, the carriage 24 is provided with engagement holes 25, 25, . . . at predetermined positions through which the shaft reinforcing bars 22 are passed.

また、型枠体10基端には、第6図に示すように、型枠
端板26がボルドーナツト27により着脱自在に取付け
られており、その型枠端板26にはコンクリート製品の
端板28を着脱する手段及び軸鉄筋22を係止する手段
が設けられている。なお、これらの構造は従来公知の杭
管qコンクリート製品を製造する装置と同様のものであ
るから、詳細な説明は省略する。
Further, as shown in FIG. 6, a formwork end plate 26 is removably attached to the base end of the formwork body 10 by bolt donuts 27, and the formwork end plate 26 is provided with an end plate of a concrete product. Means for attaching and detaching the shaft reinforcing bar 28 and means for locking the shaft reinforcing bar 22 are provided. It should be noted that these structures are similar to the conventionally known apparatus for producing pile pipe q concrete products, and therefore detailed explanations will be omitted.

本発明方法は、前述した装置を使用して行われる。まず
、型枠体1は図のように上型枠3.3を下型枠2と接続
するように閉じた状態にして連結体10により固定する
。この場合、上型枠3,3の端部間には間隙a(第3図
)が形成されるよう罠なっている。また、型枠体1の軸
心部にはシャフト11が吊杆12に取付けられた支持m
14によって支持されるが、その際、シャフト11の外
周には、図示を略したが、縁切材が被着される。この縁
切材は、シャフト11とコンクリートとの接着を防止し
、製品成型後のシャフト11の引抜きを容易にさせるた
めのものであって、パラフィン等を厚目に塗着させても
よいが、一般的に、滑りと弾力性に優れた合成樹脂製シ
ート、例えばエアーバックを用いるのが好適である。ま
た、この型枠体10組付は時には、前述したように、型
枠体1の先端に台車24及び補助台23に支持された既
製部材16の基端部を嵌着させ、また型枠体の基端には
製品の端板28を取付けた型枠端板26をボルドーナツ
ト27により装着するとともに、台車24から型枠端板
26間に所定数の軸鉄筋22.22・・・を張架し1台
車24の係合孔25より突出した軸鉄筋22のネジ部(
図示を略す)にナツト29を締め込んで軸鉄筋22に緊
張を与えるようにする。
The method of the invention is carried out using the apparatus described above. First, the formwork 1 is fixed by the connecting body 10 in a closed state so that the upper formwork 3.3 is connected to the lower formwork 2 as shown in the figure. In this case, a gap a (FIG. 3) is formed between the ends of the upper formworks 3, 3. In addition, a shaft 11 is attached to a support m attached to a hanging rod 12 at the axial center of the form body 1.
At this time, an edge cutting material (not shown) is applied to the outer periphery of the shaft 11. This edge cutting material is to prevent adhesion between the shaft 11 and concrete and to facilitate the pulling out of the shaft 11 after molding the product, and may be thickly coated with paraffin or the like. Generally, it is preferable to use a synthetic resin sheet with excellent slippage and elasticity, such as an air bag. In addition, as described above, the formwork 10 is sometimes assembled by fitting the proximal end of the ready-made member 16 supported by the cart 24 and the auxiliary stand 23 onto the tip of the formwork 1; The formwork end plate 26 with the end plate 28 of the product attached is attached to the base end of the frame using bolt nuts 27, and a predetermined number of shaft reinforcing bars 22, 22, etc. are stretched between the formwork end plate 26 from the trolley 24. The threaded portion (
(not shown) is tightened to apply tension to the shaft reinforcing bar 22.

そして、型枠体1内へ間隙aからコンクリートを投入し
、上型枠5,30間間隙部分にはならし板(図示を略す
)を用いて円滑に仕上げる。コンクリートが硬化したな
らば、連結体10と上型枠3,3及び吊杆12との結合
を解除して連結体10を取外し、上型枠6.ろをピン8
,8を中心に外方へ開く。そして、軸鉄筋22と台車2
4との結合を解くとともに、型枠端板26を取除き、台
車24を既製部材16から引離し、また、シャフト11
を取手15を利用してコンクIJ −ト中より引抜く。
Concrete is then poured into the formwork 1 through the gap a, and smoothed using leveling plates (not shown) in the gap between the upper formworks 5 and 30. Once the concrete has hardened, the connections between the connecting body 10, the upper formworks 3, 3, and the hanging rods 12 are released, the connecting body 10 is removed, and the upper formwork 6. Loo pin 8
, 8 opens outward. Then, the shaft reinforcing bar 22 and the truck 2
4, the formwork end plate 26 is removed, the carriage 24 is separated from the ready-made member 16, and the shaft 11
Using the handle 15, pull out the concrete IJ from inside the container.

ついで吊杆12を利用して型枠中のコンクリート製品を
吊上げて取出すのである。取出されたコンクリート製品
には吊杆12が突出しているが、この吊杆12はその突
出部分を切除するか、或は、支持環14との螺着を解い
て引抜き、それによってできた孔にはモルタル等を埋込
む」:うにする。以上の工程でコンクリ−ト製品の製造
が完了することKなる。
Next, the concrete product in the formwork is lifted and taken out using the hanging rods 12. A hanging rod 12 protrudes from the concrete product taken out, and the hanging rod 12 can be removed by cutting off the protruding portion or unscrewed from the support ring 14 and pulled out, and inserted into the hole created thereby. "Insert mortar etc.": bury mortar etc. The above steps complete the manufacture of the concrete product.

上記の実施例は、尖頭部を有する杭の製造についてのも
のであるが1本発明はこれに限定されるものではなく、
頭部を平坦に形成した抗やヒユーム管等の単純な形状の
コンクリート製品の製造にも広く利用することができる
。その場合には1図示のような尖頭既製部材16の取付
けに代って、型枠体1の先端部に従来性われているよう
な型枠端板を取付けるようにすればよいことになる。
Although the above embodiment relates to the manufacture of a pile having a pointed head, the present invention is not limited thereto;
It can also be widely used in the production of concrete products with simple shapes such as shafts with flat heads and humid pipes. In that case, instead of attaching the pointed ready-made member 16 as shown in Figure 1, it is sufficient to attach a conventional formwork end plate to the tip of the formwork body 1. .

以上説明したように、本発明は、下型枠に2個の縦割と
した上型枠を開閉自在に接続し、上型枠を閉じた状態に
結合する連結体に吊杆を設け、これに取付けた支持環に
よって、コンクリート製品の中空部を形成させるための
シャフトを支持させるようKした装置を用い、成型にあ
たっては、シャフトの外周にエアーバック等の安価で剥
離性の良好な縁切劇を被着させ、コンクリートを2個の
上型枠の間隙から手詰めKより投入させるようにしたの
で、従来の遠心力成型によるようなコンクリートの分離
がおきず、高強度の製品が得られるとともに、型枠が簡
単で成型用の動力を必要とせず、装置が安価でランニン
グコストも低減される。
As explained above, the present invention connects two vertically divided upper formworks to a lower formwork in an openable and closable manner, and provides suspension rods on the connecting body that connects the upper formworks in a closed state. A device is used to support the shaft for forming the hollow part of the concrete product using a support ring attached to the support ring, and during molding, an inexpensive edge cutter with good removability such as an air bag is applied to the outer periphery of the shaft. Since the concrete is deposited by hand through the gap between the two upper formworks, there is no separation of the concrete that occurs with conventional centrifugal force forming, and a high-strength product is obtained. The mold is simple, no power is required for molding, the equipment is inexpensive, and running costs are reduced.

また、コンクリート製品の中空部を形成するためのシャ
フトは、吊杆により支持するため精度が良好であるとと
もに、シャフトには剥離性のよい縁切材を被着するので
、成型後のシャフトの引抜きが容易にでき、しかも、吊
杆を利用して製品の型枠内からの取出し、運搬が容易と
なり、全体に良質の中空プレキャストコンクリート製品
を良質で安価に製造することができる等、多くの優れた
効果を奏するものである。
In addition, the shaft used to form the hollow part of the concrete product has good accuracy because it is supported by hanging rods, and the shaft is coated with edge cutting material that has good releasability, so the shaft can be pulled out after molding. It has many advantages, such as being able to easily take out and transport the product from the formwork using hanging rods, and making it possible to manufacture hollow precast concrete products of good quality overall at low cost. It has the following effects.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明における装置の一実施例を示したもので、
第1図は平面図、第2図は側面図、第3図は拡大正断面
図、第4図は型枠体の先端に既製部材を取付けたところ
を示す拡大側断面図、第5図は吊杆によりシャフトを支
持したところの部分拡大側断面図、第6図は型枠体基端
部を示した拡大側断面図である。 1・・・型枠体、2・・・下型枠、6・・・上型枠、6
・・・架台、8・・・ビン、10・・・連結体、11・
・・シャフト、12・・・吊杆、14・・・支持環、1
6・・・既製部材、22・・・軸鉄筋。 23・・・補助台、24・・・軸鉄筋引張用台車、26
・・・型枠端板、28・・・製品の端板、a・・・間隙
第6図
The drawing shows an embodiment of the device according to the present invention.
Fig. 1 is a plan view, Fig. 2 is a side view, Fig. 3 is an enlarged front sectional view, Fig. 4 is an enlarged side sectional view showing the ready-made member attached to the tip of the form body, and Fig. 5 is an enlarged side sectional view. FIG. 6 is a partially enlarged side sectional view showing the shaft supported by the hanging rod, and FIG. 6 is an enlarged side sectional view showing the base end of the form body. 1... Formwork body, 2... Lower formwork, 6... Upper formwork, 6
... Frame, 8... Bin, 10... Connector, 11.
...Shaft, 12... Hanging rod, 14... Support ring, 1
6...Ready-made member, 22... Axial reinforcing bar. 23... Auxiliary stand, 24... Shaft reinforcing bar tensioning cart, 26
... Formwork end plate, 28... Product end plate, a... Gap Fig. 6

Claims (2)

【特許請求の範囲】[Claims] (1)半円形の下型枠に2個縦割状上型枠を開閉自在に
接続した型枠体の中心部に、中空部形成用のシャフト&
縁切拐を被着して吊設し、型枠体内圧コンクリートを投
入して成型後。 シャフトの引抜き及び脱型することを特徴とする。中空
プレキャストコンクリート製品の製造方法。
(1) Two vertically divided upper formworks are connected to a semicircular lower formwork so that they can be opened and closed.In the center of the formwork, there is a shaft and
After applying edge cutting and hanging, pressurized concrete is poured into the formwork and formed. It is characterized by pulling out and demolding the shaft. Method for manufacturing hollow precast concrete products.
(2)半円形の下型枠に2個の縦割状上型枠を開閉自在
に接続するとともに、上型枠を閉じた状態に固定する連
結体に吊杆を垂設し、吊杆の下端に製品中空部形成用シ
ャフトを引抜自在に支持したことを特徴とする。中空プ
レキャストコンクリート製品の製造装置。
(2) The two vertically divided upper formworks are connected to the semicircular lower formwork so that they can be opened and closed, and hanging rods are hung from the connecting body that fixes the upper formwork in a closed state. It is characterized in that a shaft for forming a hollow part of the product is removably supported at the lower end. Manufacturing equipment for hollow precast concrete products.
JP15023483A 1983-08-19 1983-08-19 Method and device for manufacturing hollow precast concrete product Pending JPS6042012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15023483A JPS6042012A (en) 1983-08-19 1983-08-19 Method and device for manufacturing hollow precast concrete product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15023483A JPS6042012A (en) 1983-08-19 1983-08-19 Method and device for manufacturing hollow precast concrete product

Publications (1)

Publication Number Publication Date
JPS6042012A true JPS6042012A (en) 1985-03-06

Family

ID=15492481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15023483A Pending JPS6042012A (en) 1983-08-19 1983-08-19 Method and device for manufacturing hollow precast concrete product

Country Status (1)

Country Link
JP (1) JPS6042012A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02209955A (en) * 1988-11-21 1990-08-21 General Electric Co <Ge> Useful article produced from mixed scrap plastic,and its manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02209955A (en) * 1988-11-21 1990-08-21 General Electric Co <Ge> Useful article produced from mixed scrap plastic,and its manufacture

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